has been gaining in the polls. he too delivered. >> i will be very specific. >> reporter: vice president joe biden wasted no time challenging congressman paul ryan's take on foreign policy. >> with all due respect, that's a bunch malarkey. >> and why is that so? >> not a single thing he said is accurate. >> reporter: the vice president and ryan clashed over the economy, taxes and medicare with the democrat often on the attack. >> and they're holding hostage the middle class tax cut. it's about time they take some responsibility. >> reporter: but ryan fired back. he slammed the obama administration's economic record. >> this is not what a real recovery looks like. we need real reforms for a real recovery and that's exactly what mitt romney and i are proposing. >> reporter: after several heated exchanges ryan insinuated that president obama's performance last week was motivating the vice president's >> mr. vice president, i know you're under a lot of duress to paining up for lost ground. >> reporter: as for who won,